$ git clone -n https://src.fedoraproject.org/rpms/libzypp.git /var/lib/mock/f38-build-side-42-init-devel-976912-28972/root/chroot_tmpdir/scmroot/libzypp
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-976912-28972/root/chroot_tmpdir/scmroot/libzypp'...
$ git fetch origin 79968ab24f325fec7635bc93ab1cf48ab9eda32b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libzypp
 * [new ref]         79968ab24f325fec7635bc93ab1cf48ab9eda32b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 79968ab Update to 17.31.8