$ git clone -n https://src.fedoraproject.org/rpms/xlsclients.git /var/lib/mock/f45-build-38931-730/root/chroot_tmpdir/scmroot/xlsclients
Cloning into '/var/lib/mock/f45-build-38931-730/root/chroot_tmpdir/scmroot/xlsclients'...
$ git fetch origin 3b67b1d580e8069a25214ca554ebb9fa479cdf51:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xlsclients
 * [new ref]         3b67b1d580e8069a25214ca554ebb9fa479cdf51 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b67b1d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild