$ git clone -n https://src.fedoraproject.org/rpms/glib2.git /var/lib/mock/f41-build-851703-166118/root/chroot_tmpdir/scmroot/glib2
Cloning into '/var/lib/mock/f41-build-851703-166118/root/chroot_tmpdir/scmroot/glib2'...
$ git fetch origin eed7128aa1a8402b043bc09090c24854ad4c75ff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/glib2
 * [new ref]         eed7128aa1a8402b043bc09090c24854ad4c75ff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eed7128 Update to 2.82.0