$ git clone -n https://src.fedoraproject.org/rpms/kf6-kcrash.git /var/lib/mock/f42-build-867795-175816/root/chroot_tmpdir/scmroot/kf6-kcrash
Cloning into '/var/lib/mock/f42-build-867795-175816/root/chroot_tmpdir/scmroot/kf6-kcrash'...
$ git fetch origin 103037aaf254df7850691815a05007a2b6ef3e5e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kcrash
 * [new ref]         103037aaf254df7850691815a05007a2b6ef3e5e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 103037a Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild