$ git clone -n https://src.fedoraproject.org/rpms/cups.git /var/lib/mock/f40-build-786621-134469/root/chroot_tmpdir/scmroot/cups
Cloning into '/var/lib/mock/f40-build-786621-134469/root/chroot_tmpdir/scmroot/cups'...
$ git fetch origin e060d87945c0f116cfe005112b1aac35970a85bf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cups
 * [new ref]         e060d87945c0f116cfe005112b1aac35970a85bf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e060d87 2263053 - CUPS/libppd PPD generators didn't check required attrs when deciding which driverless format to use,