$ git clone -n https://src.fedoraproject.org/rpms/rubygem-gtk3.git /var/lib/mock/f37-build-side-32-misc-devel-389996-15994/root/chroot_tmpdir/scmroot/rubygem-gtk3
Cloning into '/var/lib/mock/f37-build-side-32-misc-devel-389996-15994/root/chroot_tmpdir/scmroot/rubygem-gtk3'...
$ git reset --hard 79f8e9bf0a82a6d7d4db5f9886d05dfc20bb39eb
HEAD is now at 79f8e9b 4.0.5