$ git clone -n https://src.fedoraproject.org/rpms/ceph.git /var/lib/mock/f41-build-848673-164543/root/chroot_tmpdir/scmroot/ceph
Cloning into '/var/lib/mock/f41-build-848673-164543/root/chroot_tmpdir/scmroot/ceph'...
remote: warning: refname 'HEAD' is ambiguous.        
$ git reset --hard 7c29df3d82e8609921a34fb450c0068f8f856460
HEAD is now at 7c29df3 ceph-19.1.1 RC