$ git clone -n https://src.fedoraproject.org/rpms/snowcrash.git /var/lib/mock/f40-build-2170815-51031/root/chroot_tmpdir/scmroot/snowcrash
Cloning into '/var/lib/mock/f40-build-2170815-51031/root/chroot_tmpdir/scmroot/snowcrash'...
$ git fetch origin 20530553f6fbc3ff701bacd51f776618b9e8fc78:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/snowcrash
 * [new ref]         20530553f6fbc3ff701bacd51f776618b9e8fc78 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2053055 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild