$ git clone -n https://src.fedoraproject.org/rpms/rust-libcramjam.git /var/lib/mock/f40-build-800034-142746/root/chroot_tmpdir/scmroot/rust-libcramjam
Cloning into '/var/lib/mock/f40-build-800034-142746/root/chroot_tmpdir/scmroot/rust-libcramjam'...
$ git reset --hard b1a9fe5df8ac822591200285e856bd600cd62f54
HEAD is now at b1a9fe5 Update to 0.3.0 (close RHBZ#2268667)