$ git clone -n https://src.fedoraproject.org/rpms/perl-Digest-SHA.git /var/lib/mock/f45-build-23146-596/root/chroot_tmpdir/scmroot/perl-Digest-SHA
Cloning into '/var/lib/mock/f45-build-23146-596/root/chroot_tmpdir/scmroot/perl-Digest-SHA'...
$ git fetch origin 1d11fc4f5677565828169cd893c1e6b05dd6fda5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Digest-SHA
 * [new ref]         1d11fc4f5677565828169cd893c1e6b05dd6fda5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1d11fc4 Perl 5.44 re-rebuild of bootstrapped packages