$ git clone -n https://src.fedoraproject.org/rpms/regextester.git /var/lib/mock/f39-build-1582009-38102/root/chroot_tmpdir/scmroot/regextester
Cloning into '/var/lib/mock/f39-build-1582009-38102/root/chroot_tmpdir/scmroot/regextester'...
$ git fetch origin 964e2f38e1aa6142675499f5c41fe29571c28604:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/regextester
 * [new ref]         964e2f38e1aa6142675499f5c41fe29571c28604 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 964e2f3 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild