$ git clone -n https://src.fedoraproject.org/rpms/cockpit-files.git /var/lib/mock/f45-build-46560-846/root/chroot_tmpdir/scmroot/cockpit-files
Cloning into '/var/lib/mock/f45-build-46560-846/root/chroot_tmpdir/scmroot/cockpit-files'...
$ git fetch origin 8ccef356d092c359a028d13eb59b3011c21e217c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cockpit-files
 * [new ref]         8ccef356d092c359a028d13eb59b3011c21e217c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ccef35 Update to 44 upstream release