$ git clone -n https://src.fedoraproject.org/rpms/rust-roxmltree0.18.git /var/lib/mock/f41-build-710633-13019/root/chroot_tmpdir/scmroot/rust-roxmltree0.18
Cloning into '/var/lib/mock/f41-build-710633-13019/root/chroot_tmpdir/scmroot/rust-roxmltree0.18'...
$ git fetch origin 4a585a5b60537bc6ccc7ef7bb88f69f395d30512:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-roxmltree0.18
 * [new ref]         4a585a5b60537bc6ccc7ef7bb88f69f395d30512 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4a585a5 compat package no longer needed