$ git clone -n https://src.fedoraproject.org/rpms/cosmic-bg.git /var/lib/mock/f41-build-858477-168433/root/chroot_tmpdir/scmroot/cosmic-bg
Cloning into '/var/lib/mock/f41-build-858477-168433/root/chroot_tmpdir/scmroot/cosmic-bg'...
$ git fetch origin e7d752e6df161f135447757def7391ba42813608:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cosmic-bg
 * [new ref]         e7d752e6df161f135447757def7391ba42813608 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e7d752e "Update to 1.0.0~alpha.2"