$ git clone -n https://src.fedoraproject.org/rpms/perl-Env.git /var/lib/mock/f45-build-23347-597/root/chroot_tmpdir/scmroot/perl-Env
Cloning into '/var/lib/mock/f45-build-23347-597/root/chroot_tmpdir/scmroot/perl-Env'...
$ git fetch origin c7fd9920a33e4845b307a254cb30a4e602bf533e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Env
 * [new ref]         c7fd9920a33e4845b307a254cb30a4e602bf533e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c7fd992 Increase release to favour standalone package