$ git clone -n https://src.fedoraproject.org/rpms/nailgun.git /var/lib/mock/f31-build-57149-28302/root/chroot_tmpdir/scmroot/nailgun
Cloning into '/var/lib/mock/f31-build-57149-28302/root/chroot_tmpdir/scmroot/nailgun'...
$ git reset --hard 79b958f88ca9247da8b29d3e47952c233e2ec3af
HEAD is now at 79b958f - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild