$ git clone -n https://src.fedoraproject.org/rpms/rubygem-memoizer.git /var/lib/mock/f39-build-1500718-34793/root/chroot_tmpdir/scmroot/rubygem-memoizer
Cloning into '/var/lib/mock/f39-build-1500718-34793/root/chroot_tmpdir/scmroot/rubygem-memoizer'...
$ git fetch origin f97d35fad5d440213b0a069b2baf2bc5d615f9bc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-memoizer
 * [new ref]         f97d35fad5d440213b0a069b2baf2bc5d615f9bc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f97d35f Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild