$ git clone -n https://src.fedoraproject.org/rpms/spectacle.git /var/lib/mock/f40-build-1897523-25065/root/chroot_tmpdir/scmroot/spectacle
Cloning into '/var/lib/mock/f40-build-1897523-25065/root/chroot_tmpdir/scmroot/spectacle'...
$ git fetch origin cf8999a5dc8ef435211ad6a077c44e813b3b03f8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/spectacle
 * [new ref]         cf8999a5dc8ef435211ad6a077c44e813b3b03f8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf8999a Merge branch 'rawhide' into f40