$ git clone -n https://src.fedoraproject.org/rpms/kalarm.git /var/lib/mock/f45-build-14551-461/root/chroot_tmpdir/scmroot/kalarm
Cloning into '/var/lib/mock/f45-build-14551-461/root/chroot_tmpdir/scmroot/kalarm'...
$ git fetch origin beadb5769131585c20bed6a909a6e55f8eaa37be:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kalarm
 * [new ref]         beadb5769131585c20bed6a909a6e55f8eaa37be -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at beadb57 26.08.1