$ git clone -n https://src.fedoraproject.org/rpms/rust-treeline.git /var/lib/mock/f41-build-side-1-3108567-39382/root/chroot_tmpdir/scmroot/rust-treeline
Cloning into '/var/lib/mock/f41-build-side-1-3108567-39382/root/chroot_tmpdir/scmroot/rust-treeline'...
$ git fetch origin 0f2cd2fb63c0871603175fcb2d807f8aa6bcf415:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-treeline
 * [new ref]         0f2cd2fb63c0871603175fcb2d807f8aa6bcf415 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0f2cd2f unused leaf package for more than two release cycles