$ git clone -n https://src.fedoraproject.org/rpms/perl-Proc-ForkSafe.git /var/lib/mock/f40-build-2020388-46624/root/chroot_tmpdir/scmroot/perl-Proc-ForkSafe
Cloning into '/var/lib/mock/f40-build-2020388-46624/root/chroot_tmpdir/scmroot/perl-Proc-ForkSafe'...
$ git fetch origin 46e28b0454842dcbf0b51fde38a70ef3f60483f8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Proc-ForkSafe
 * [new ref]         46e28b0454842dcbf0b51fde38a70ef3f60483f8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 46e28b0 Initial import