$ git clone -n https://src.fedoraproject.org/rpms/R-reshape2.git /var/lib/mock/f45-build-6360-348/root/chroot_tmpdir/scmroot/R-reshape2
Cloning into '/var/lib/mock/f45-build-6360-348/root/chroot_tmpdir/scmroot/R-reshape2'...
$ git fetch origin 6ff71cd0235586a63239ce9fd8801fff75933f48:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-reshape2
 * [new ref]         6ff71cd0235586a63239ce9fd8801fff75933f48 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6ff71cd Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild