$ git clone -n https://src.fedoraproject.org/rpms/rust-pulldown-cmark0.9.git /var/lib/mock/f42-build-side-1-3504283-45983/root/chroot_tmpdir/scmroot/rust-pulldown-cmark0.9
Cloning into '/var/lib/mock/f42-build-side-1-3504283-45983/root/chroot_tmpdir/scmroot/rust-pulldown-cmark0.9'...
$ git fetch origin f33a269ab0aeeff8899ecda4fcd035474a819868:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pulldown-cmark0.9
 * [new ref]         f33a269ab0aeeff8899ecda4fcd035474a819868 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f33a269 compat package no longer needed