$ git clone -n https://src.fedoraproject.org/rpms/gnome-initial-setup.git /var/lib/mock/f39-build-1639357-40110/root/chroot_tmpdir/scmroot/gnome-initial-setup
Cloning into '/var/lib/mock/f39-build-1639357-40110/root/chroot_tmpdir/scmroot/gnome-initial-setup'...
$ git fetch origin 19301fb670ea4a886e15c127ba025c72159ea409:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-initial-setup
 * [new ref]         19301fb670ea4a886e15c127ba025c72159ea409 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 19301fb Update to 45.0