$ git clone -n https://src.fedoraproject.org/rpms/cave9.git /var/lib/mock/f39-build-1674065-40876/root/chroot_tmpdir/scmroot/cave9
Cloning into '/var/lib/mock/f39-build-1674065-40876/root/chroot_tmpdir/scmroot/cave9'...
$ git fetch origin 8aaed2e1fdc3ad7ab57c71817ceed4c91d5b5c06:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cave9
 * [new ref]         8aaed2e1fdc3ad7ab57c71817ceed4c91d5b5c06 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8aaed2e Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild