$ git clone -n https://src.fedoraproject.org/rpms/perl-Encode.git /var/lib/mock/f40-build-2202016-51866/root/chroot_tmpdir/scmroot/perl-Encode
Cloning into '/var/lib/mock/f40-build-2202016-51866/root/chroot_tmpdir/scmroot/perl-Encode'...
$ git fetch origin 857bcc2b1f60b3a6881942f6c75dc931593a01a7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Encode
 * [new ref]         857bcc2b1f60b3a6881942f6c75dc931593a01a7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 857bcc2 3.20 bump (rhbz#2248987)