$ git clone -n https://src.fedoraproject.org/rpms/rubygem-cairo.git /var/lib/mock/f37-build-647597-72717/root/chroot_tmpdir/scmroot/rubygem-cairo
Cloning into '/var/lib/mock/f37-build-647597-72717/root/chroot_tmpdir/scmroot/rubygem-cairo'...
$ git reset --hard d579596aab94b04b7f8bebb3e1c44171abf25185
HEAD is now at d579596 1.17.8