$ git clone -n https://src.fedoraproject.org/rpms/perl-Compress-Raw-Zlib.git /var/lib/mock/f40-build-803200-144204/root/chroot_tmpdir/scmroot/perl-Compress-Raw-Zlib
Cloning into '/var/lib/mock/f40-build-803200-144204/root/chroot_tmpdir/scmroot/perl-Compress-Raw-Zlib'...
$ git fetch origin 9afb4ebefad6be22a3a01e704e5517d9cf66bed5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Compress-Raw-Zlib
 * [new ref]         9afb4ebefad6be22a3a01e704e5517d9cf66bed5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9afb4eb 2.209 bump (rhbz#2266094)