$ git clone -n https://src.fedoraproject.org/rpms/restic.git /var/lib/mock/f39-build-1975609-43331/root/chroot_tmpdir/scmroot/restic
Cloning into '/var/lib/mock/f39-build-1975609-43331/root/chroot_tmpdir/scmroot/restic'...
$ git fetch origin 71ef2c47a8d60a3195ee65b582debe7af31f0202:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/restic
 * [new ref]         71ef2c47a8d60a3195ee65b582debe7af31f0202 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 71ef2c4 Update to 0.16.2 - Closes rhbz#2227921