$ git clone -n https://src.fedoraproject.org/rpms/lzma-sdk.git /var/lib/mock/f41-build-856826-167776/root/chroot_tmpdir/scmroot/lzma-sdk
Cloning into '/var/lib/mock/f41-build-856826-167776/root/chroot_tmpdir/scmroot/lzma-sdk'...
$ git fetch origin 7179ea86fed24e2d8c0ab7a9839a20925820b59d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lzma-sdk
 * [new ref]         7179ea86fed24e2d8c0ab7a9839a20925820b59d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7179ea8 new version