$ git clone -n https://src.fedoraproject.org/rpms/ghc-simple-cmd-args.git /var/lib/mock/f40-build-743270-111169/root/chroot_tmpdir/scmroot/ghc-simple-cmd-args
Cloning into '/var/lib/mock/f40-build-743270-111169/root/chroot_tmpdir/scmroot/ghc-simple-cmd-args'...
$ git fetch origin acdb86a3c66474fff5d478eb905e249b4d2d3b77:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-simple-cmd-args
 * [new ref]         acdb86a3c66474fff5d478eb905e249b4d2d3b77 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at acdb86a bump release