$ git clone -n https://src.fedoraproject.org/rpms/perl-Cflow.git /var/lib/mock/f45-build-22255-590/root/chroot_tmpdir/scmroot/perl-Cflow
Cloning into '/var/lib/mock/f45-build-22255-590/root/chroot_tmpdir/scmroot/perl-Cflow'...
$ git fetch origin 346d95921f95921cfd4f74a08d0e04cdbd01c0e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Cflow
 * [new ref]         346d95921f95921cfd4f74a08d0e04cdbd01c0e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 346d959 Perl 5.44 rebuild