$ git clone -n https://src.fedoraproject.org/rpms/celluloid.git /var/lib/mock/f40-build-807481-145223/root/chroot_tmpdir/scmroot/celluloid
Cloning into '/var/lib/mock/f40-build-807481-145223/root/chroot_tmpdir/scmroot/celluloid'...
$ git reset --hard edc7d5d4bcbc6f23515f4a2170783155a9f1fbd5
HEAD is now at edc7d5d Update to 0.26.