$ git clone -n https://github.com/xcp-ng-rpms/xenserver-transfer-vm.git /var/lib/mock/v7.99-base-750-321/root/chroot_tmpdir/scmroot/xenserver-transfer-vm
Cloning into '/var/lib/mock/v7.99-base-750-321/root/chroot_tmpdir/scmroot/xenserver-transfer-vm'...
$ git reset --hard 1f2a1247c895a77449307cf74d21dd9be8dc2e71
fatal: Could not parse object '1f2a1247c895a77449307cf74d21dd9be8dc2e71'.