$ git clone -n https://src.fedoraproject.org/rpms/perl-Archive-Extract.git /var/lib/mock/f45-build-21784-588/root/chroot_tmpdir/scmroot/perl-Archive-Extract
Cloning into '/var/lib/mock/f45-build-21784-588/root/chroot_tmpdir/scmroot/perl-Archive-Extract'...
$ git fetch origin fc679f85c51e12a9be6f9ea71440ee8a1a53a0aa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Archive-Extract
 * [new ref]         fc679f85c51e12a9be6f9ea71440ee8a1a53a0aa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fc679f8 0.90 bump