$ git clone -n https://src.fedoraproject.org/rpms/glib-networking.git /var/lib/mock/f40-build-797278-141191/root/chroot_tmpdir/scmroot/glib-networking
Cloning into '/var/lib/mock/f40-build-797278-141191/root/chroot_tmpdir/scmroot/glib-networking'...
$ git fetch origin b2556fa560375fd3b4a6f3ce51e8b47ed815b39a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/glib-networking
 * [new ref]         b2556fa560375fd3b4a6f3ce51e8b47ed815b39a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2556fa Update to 2.80.rc