$ git clone -n https://src.fedoraproject.org/rpms/rust-libslirp.git /var/lib/mock/f42-build-3403699-45135/root/chroot_tmpdir/scmroot/rust-libslirp
Cloning into '/var/lib/mock/f42-build-3403699-45135/root/chroot_tmpdir/scmroot/rust-libslirp'...
$ git fetch origin 60ab21b5ff8a564b792e7a3211ee27f79785e37d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-libslirp
 * [new ref]         60ab21b5ff8a564b792e7a3211ee27f79785e37d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 60ab21b obsoleted by passt