$ git clone -n https://github.com/xcp-ng-rpms/ipxe.git /var/lib/mock/v8.3-base-3905-3841/root/chroot_tmpdir/scmroot/ipxe
Cloning into '/var/lib/mock/v8.3-base-3905-3841/root/chroot_tmpdir/scmroot/ipxe'...
$ git reset --hard efe167abcec2c9a136312bcf2d27cc7d3e9f45b7
Downloading SOURCES/ipxe-20121005.tar.gz (2.8 MB)
HEAD is now at efe167a Merge branch 'XS-8.3'