$ git clone -n https://src.fedoraproject.org/rpms/librepo.git /var/lib/mock/f41-build-side-2-python-2718102-30593/root/chroot_tmpdir/scmroot/librepo
Cloning into '/var/lib/mock/f41-build-side-2-python-2718102-30593/root/chroot_tmpdir/scmroot/librepo'...
$ git fetch origin 98b7c0565c443a52f1179930df4ace1c11b00650:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/librepo
 * [new ref]         98b7c0565c443a52f1179930df4ace1c11b00650 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 98b7c05 Update to 1.18.1