$ git clone -n https://src.fedoraproject.org/rpms/libblkio.git /var/lib/mock/f38-build-side-42-init-devel-1228233-30640/root/chroot_tmpdir/scmroot/libblkio
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1228233-30640/root/chroot_tmpdir/scmroot/libblkio'...
$ git fetch origin e96ec911ce2b6356caf08474ef288c58372ccca2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libblkio
 * [new ref]         e96ec911ce2b6356caf08474ef288c58372ccca2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e96ec91 Rebuild for fixed frame pointer compiler flags in Rust RPM macros