$ git clone -n https://src.fedoraproject.org/rpms/stage.git /var/lib/mock/f39-build-1902637-42866/root/chroot_tmpdir/scmroot/stage
Cloning into '/var/lib/mock/f39-build-1902637-42866/root/chroot_tmpdir/scmroot/stage'...
$ git fetch origin d956d425fd50439bcdbe491a99e0bcd51fa5335a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/stage
 * [new ref]         d956d425fd50439bcdbe491a99e0bcd51fa5335a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d956d42 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild