$ git clone -n https://src.fedoraproject.org/rpms/R-reshape.git /var/lib/mock/f45-build-6349-348/root/chroot_tmpdir/scmroot/R-reshape
Cloning into '/var/lib/mock/f45-build-6349-348/root/chroot_tmpdir/scmroot/R-reshape'...
$ git fetch origin 23426e0fbfbcc03fee44a669f2ac06d6788dee12:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-reshape
 * [new ref]         23426e0fbfbcc03fee44a669f2ac06d6788dee12 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 23426e0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild