$ git clone -n https://github.com/xcp-ng-rpms/kernel-alt.git /var/lib/mock/v8.1-base-2059-1465/root/chroot_tmpdir/scmroot/kernel-alt
Cloning into '/var/lib/mock/v8.1-base-2059-1465/root/chroot_tmpdir/scmroot/kernel-alt'...
$ git reset --hard dc74c43af149ff98cd70ca452cd25e2e6eae04d0
fatal: Could not parse object 'dc74c43af149ff98cd70ca452cd25e2e6eae04d0'.