$ git clone -n https://src.fedoraproject.org/rpms/safekeep.git /var/lib/mock/f39-build-1470145-33880/root/chroot_tmpdir/scmroot/safekeep
Cloning into '/var/lib/mock/f39-build-1470145-33880/root/chroot_tmpdir/scmroot/safekeep'...
$ git fetch origin 658b4af72960cb42b3babb9eca5bc0f05e2e3f74:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/safekeep
 * [new ref]         658b4af72960cb42b3babb9eca5bc0f05e2e3f74 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 658b4af Update with latest patches for rdiff-backup 2.2 pulled from github