$ git clone -n https://src.fedoraproject.org/rpms/libcap.git /var/lib/mock/f41-build-808163-145699/root/chroot_tmpdir/scmroot/libcap
Cloning into '/var/lib/mock/f41-build-808163-145699/root/chroot_tmpdir/scmroot/libcap'...
$ git fetch origin 120b640485cb29646adcd7d06d7caad2110875ce:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libcap
 * [new ref]         120b640485cb29646adcd7d06d7caad2110875ce -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 120b640 update to 2.70