$ git clone -n https://src.fedoraproject.org/rpms/rubygem-gtk2.git /var/lib/mock/f33-build-455088-63560/root/chroot_tmpdir/scmroot/rubygem-gtk2
Cloning into '/var/lib/mock/f33-build-455088-63560/root/chroot_tmpdir/scmroot/rubygem-gtk2'...
$ git reset --hard 4cb40f3fe8cde3c1396687b00f4e8131016ace30
HEAD is now at 4cb40f3 3.4.3