$ git clone -n https://src.fedoraproject.org/rpms/datamash.git /var/lib/mock/f39-build-1457904-33023/root/chroot_tmpdir/scmroot/datamash
Cloning into '/var/lib/mock/f39-build-1457904-33023/root/chroot_tmpdir/scmroot/datamash'...
$ git fetch origin ef28b2d412c9d28922baaa06b1906ecbdf6a4354:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/datamash
 * [new ref]         ef28b2d412c9d28922baaa06b1906ecbdf6a4354 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef28b2d Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild