$ git clone -n https://src.fedoraproject.org/rpms/perl-Crypt-GCrypt.git /var/lib/mock/f45-build-22605-593/root/chroot_tmpdir/scmroot/perl-Crypt-GCrypt
Cloning into '/var/lib/mock/f45-build-22605-593/root/chroot_tmpdir/scmroot/perl-Crypt-GCrypt'...
$ git fetch origin 1e18207170a6c4efc21785f05fe83df4d80adaef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Crypt-GCrypt
 * [new ref]         1e18207170a6c4efc21785f05fe83df4d80adaef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1e18207 Perl 5.44 rebuild