$ git clone -n https://src.fedoraproject.org/rpms/grive2.git /var/lib/mock/f39-build-1589996-38243/root/chroot_tmpdir/scmroot/grive2
Cloning into '/var/lib/mock/f39-build-1589996-38243/root/chroot_tmpdir/scmroot/grive2'...
$ git fetch origin fe752a927dc86c9c839592ae1ad366a81e1f2029:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/grive2
 * [new ref]         fe752a927dc86c9c839592ae1ad366a81e1f2029 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fe752a9 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild