$ git clone -n https://src.fedoraproject.org/rpms/amg4psblas.git /var/lib/mock/f41-build-1120138-20264/root/chroot_tmpdir/scmroot/amg4psblas
Cloning into '/var/lib/mock/f41-build-1120138-20264/root/chroot_tmpdir/scmroot/amg4psblas'...
$ git fetch origin 00aa87626db992110804c1b4a8d65e16bc592569:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/amg4psblas
 * [new ref]         00aa87626db992110804c1b4a8d65e16bc592569 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 00aa876 Fix Description