$ git clone -n https://src.fedoraproject.org/rpms/glib2.git /var/lib/mock/f41-build-side-1-2793325-32695/root/chroot_tmpdir/scmroot/glib2
Cloning into '/var/lib/mock/f41-build-side-1-2793325-32695/root/chroot_tmpdir/scmroot/glib2'...
$ git fetch origin f2ebcd4032a6e3bb354eba637bd7594b2e60d7dd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/glib2
 * [new ref]         f2ebcd4032a6e3bb354eba637bd7594b2e60d7dd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f2ebcd4 Fix default-terminal.patch to actually work