$ git clone -n https://src.fedoraproject.org/rpms/rust-async-mutex.git /var/lib/mock/f41-build-side-1-2790976-32649/root/chroot_tmpdir/scmroot/rust-async-mutex
Cloning into '/var/lib/mock/f41-build-side-1-2790976-32649/root/chroot_tmpdir/scmroot/rust-async-mutex'...
$ git fetch origin dc4063732e196c587ddbf141eef6f070508141f1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-async-mutex
 * [new ref]         dc4063732e196c587ddbf141eef6f070508141f1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dc40637 Orphaned for 6+ weeks