$ git clone -n https://src.fedoraproject.org/rpms/mypaint-brushes.git /var/lib/mock/f40-build-2012246-45779/root/chroot_tmpdir/scmroot/mypaint-brushes
Cloning into '/var/lib/mock/f40-build-2012246-45779/root/chroot_tmpdir/scmroot/mypaint-brushes'...
$ git fetch origin 61db6d976693a1d4a25dcf700240a49f116c7f0e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mypaint-brushes
 * [new ref]         61db6d976693a1d4a25dcf700240a49f116c7f0e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 61db6d9 Fast forward release to 9