$ git clone -n https://src.fedoraproject.org/rpms/zmat.git /var/lib/mock/f39-build-2504399-61698/root/chroot_tmpdir/scmroot/zmat
Cloning into '/var/lib/mock/f39-build-2504399-61698/root/chroot_tmpdir/scmroot/zmat'...
$ git fetch origin 270df9ad7805f73e6d2cabaf8a729f3c97bcff88:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zmat
 * [new ref]         270df9ad7805f73e6d2cabaf8a729f3c97bcff88 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 270df9a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild