$ git clone -n https://src.fedoraproject.org/rpms/R-reshape2.git /var/lib/mock/f38-build-725157-99560/root/chroot_tmpdir/scmroot/R-reshape2
Cloning into '/var/lib/mock/f38-build-725157-99560/root/chroot_tmpdir/scmroot/R-reshape2'...
$ git fetch origin cc6042a1dd94c931a7cf0707afd6d9601a5eb27c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-reshape2
 * [new ref]         cc6042a1dd94c931a7cf0707afd6d9601a5eb27c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cc6042a R-maint-sig mass rebuild