$ git clone -n https://src.fedoraproject.org/rpms/perl-Alien-pkgconf.git /var/lib/mock/f40-build-778059-129739/root/chroot_tmpdir/scmroot/perl-Alien-pkgconf
Cloning into '/var/lib/mock/f40-build-778059-129739/root/chroot_tmpdir/scmroot/perl-Alien-pkgconf'...
$ git fetch origin c50d7dfeda007c91af9f55bae79ef80bb3ca1f15:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Alien-pkgconf
 * [new ref]         c50d7dfeda007c91af9f55bae79ef80bb3ca1f15 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c50d7df Fix a priority in the source license value