$ git clone -n https://src.fedoraproject.org/rpms/at.git /var/lib/mock/f39-build-1494807-34543/root/chroot_tmpdir/scmroot/at
Cloning into '/var/lib/mock/f39-build-1494807-34543/root/chroot_tmpdir/scmroot/at'...
$ git fetch origin 0489cbcbe2c133a8c9a00d1e80297247f30d4593:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/at
 * [new ref]         0489cbcbe2c133a8c9a00d1e80297247f30d4593 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0489cbc Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild