$ git clone -n https://src.fedoraproject.org/rpms/kgrab.git /var/lib/mock/f39-build-1505346-35129/root/chroot_tmpdir/scmroot/kgrab
Cloning into '/var/lib/mock/f39-build-1505346-35129/root/chroot_tmpdir/scmroot/kgrab'...
$ git fetch origin f0d103b3612b4d1e288b37ef586900359a2c5262:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kgrab
 * [new ref]         f0d103b3612b4d1e288b37ef586900359a2c5262 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f0d103b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild