$ git clone -n https://src.fedoraproject.org/rpms/rust-pulldown-cmark0.8.git /var/lib/mock/f42-build-side-1-3587017-46927/root/chroot_tmpdir/scmroot/rust-pulldown-cmark0.8
Cloning into '/var/lib/mock/f42-build-side-1-3587017-46927/root/chroot_tmpdir/scmroot/rust-pulldown-cmark0.8'...
$ git fetch origin 660b8e2bce1feedc3421d62225306b103c2635ac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pulldown-cmark0.8
 * [new ref]         660b8e2bce1feedc3421d62225306b103c2635ac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 660b8e2 compat package no longer needed