$ git clone -n https://src.fedoraproject.org/rpms/python-defcon.git /var/lib/mock/f39-build-1830444-41882/root/chroot_tmpdir/scmroot/python-defcon
Cloning into '/var/lib/mock/f39-build-1830444-41882/root/chroot_tmpdir/scmroot/python-defcon'...
$ git fetch origin 48d79842555bcb00edc1650c10d9bf4675dd015f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-defcon
 * [new ref]         48d79842555bcb00edc1650c10d9bf4675dd015f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 48d7984 Merge branch 'v0.10' into rawhide