$ git clone -n https://github.com/xcp-ng-rpms/blktap-kernel4.9.git /var/lib/mock/dev-testing-342-107/root/chroot_tmpdir/scmroot/blktap-kernel4.9
Cloning into '/var/lib/mock/dev-testing-342-107/root/chroot_tmpdir/scmroot/blktap-kernel4.9'...
$ git reset --hard e2d4e556bdaf3ccf0410397a8c6348cc82c64954
fatal: Could not parse object 'e2d4e556bdaf3ccf0410397a8c6348cc82c64954'.