$ git clone -n https://src.fedoraproject.org/rpms/rust-az-cvm-vtpm.git /var/lib/mock/f42-build-3252995-41225/root/chroot_tmpdir/scmroot/rust-az-cvm-vtpm
Cloning into '/var/lib/mock/f42-build-3252995-41225/root/chroot_tmpdir/scmroot/rust-az-cvm-vtpm'...
$ git fetch origin aafb0b3b2e809b2e08bb5e864eda1d7a63841e21:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-az-cvm-vtpm
 * [new ref]         aafb0b3b2e809b2e08bb5e864eda1d7a63841e21 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aafb0b3 Set supported arches to x86_64