$ git clone -n https://src.fedoraproject.org/rpms/rubygem-gtk2.git /var/lib/mock/f31-build-114927-34483/root/chroot_tmpdir/scmroot/rubygem-gtk2
Cloning into '/var/lib/mock/f31-build-114927-34483/root/chroot_tmpdir/scmroot/rubygem-gtk2'...
$ git reset --hard dcb4fdf3505abca7a2133f57439ae6be315bac45
HEAD is now at dcb4fdf 3.3.7