$ git clone -n https://src.fedoraproject.org/rpms/gnome-shell.git /var/lib/mock/f38-build-710095-93229/root/chroot_tmpdir/scmroot/gnome-shell
Cloning into '/var/lib/mock/f38-build-710095-93229/root/chroot_tmpdir/scmroot/gnome-shell'...
$ git fetch origin 89c4baf7ba7c2497ae5f45093126596ddaa0c54a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-shell
 * [new ref]         89c4baf7ba7c2497ae5f45093126596ddaa0c54a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 89c4baf Update to 44.1