$ git clone -n https://src.fedoraproject.org/rpms/perl-Crypt-URandom.git /var/lib/mock/f45-build-22662-593/root/chroot_tmpdir/scmroot/perl-Crypt-URandom
Cloning into '/var/lib/mock/f45-build-22662-593/root/chroot_tmpdir/scmroot/perl-Crypt-URandom'...
$ git fetch origin 5feef98d91dbb8602227046cca6dc8702b83a135:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Crypt-URandom
 * [new ref]         5feef98d91dbb8602227046cca6dc8702b83a135 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5feef98 Perl 5.44 rebuild