$ git clone -n https://src.fedoraproject.org/rpms/libsolv.git /var/lib/mock/f41-build-813814-148818/root/chroot_tmpdir/scmroot/libsolv
Cloning into '/var/lib/mock/f41-build-813814-148818/root/chroot_tmpdir/scmroot/libsolv'...
$ git fetch origin 41d6548c6d2ec13e6aeb43dad78230ee2ee856b3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libsolv
 * [new ref]         41d6548c6d2ec13e6aeb43dad78230ee2ee856b3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 41d6548 Perl 5.40 rebuild