$ git clone -n https://src.fedoraproject.org/rpms/chrony.git /var/lib/mock/f39-build-1657538-40566/root/chroot_tmpdir/scmroot/chrony
Cloning into '/var/lib/mock/f39-build-1657538-40566/root/chroot_tmpdir/scmroot/chrony'...
$ git fetch origin 271a50e6c18ca9e7d6fb5795753ca0777a4e0a19:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/chrony
 * [new ref]         271a50e6c18ca9e7d6fb5795753ca0777a4e0a19 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 271a50e 4.4-1