$ git clone -n https://src.fedoraproject.org/rpms/perl-MooseX-Extended.git /var/lib/mock/f39-build-1978338-43336/root/chroot_tmpdir/scmroot/perl-MooseX-Extended
Cloning into '/var/lib/mock/f39-build-1978338-43336/root/chroot_tmpdir/scmroot/perl-MooseX-Extended'...
$ git fetch origin 0619f37e1492f75fac2a61fc62e17be474ce756d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-MooseX-Extended
 * [new ref]         0619f37e1492f75fac2a61fc62e17be474ce756d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0619f37 Initial import.