$ git clone -n https://src.fedoraproject.org/rpms/R-snow.git /var/lib/mock/f39-build-1496135-34547/root/chroot_tmpdir/scmroot/R-snow
Cloning into '/var/lib/mock/f39-build-1496135-34547/root/chroot_tmpdir/scmroot/R-snow'...
$ git fetch origin 5eba64f5b42266389531d7290175f32af9e0f5eb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-snow
 * [new ref]         5eba64f5b42266389531d7290175f32af9e0f5eb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5eba64f Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild