$ git clone -n https://src.fedoraproject.org/rpms/perl-IO-Compress.git /var/lib/mock/f39-build-1434454-31926/root/chroot_tmpdir/scmroot/perl-IO-Compress
Cloning into '/var/lib/mock/f39-build-1434454-31926/root/chroot_tmpdir/scmroot/perl-IO-Compress'...
$ git fetch origin c5f028f03b0025218a81cd6d3e8c7ee729646c55:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-IO-Compress
 * [new ref]         c5f028f03b0025218a81cd6d3e8c7ee729646c55 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c5f028f 2.206 bump (rhbz#2225676)