$ git clone -n https://src.fedoraproject.org/rpms/rubygem-yard.git /var/lib/mock/f39-build-1499376-34744/root/chroot_tmpdir/scmroot/rubygem-yard
Cloning into '/var/lib/mock/f39-build-1499376-34744/root/chroot_tmpdir/scmroot/rubygem-yard'...
$ git fetch origin d8e1416f79e7d176d83e710877683979ff3f9ac9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-yard
 * [new ref]         d8e1416f79e7d176d83e710877683979ff3f9ac9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d8e1416 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild