$ git clone -n https://src.fedoraproject.org/rpms/rubygem-unicode-display_width.git /var/lib/mock/f45-build-35391-695/root/chroot_tmpdir/scmroot/rubygem-unicode-display_width
Cloning into '/var/lib/mock/f45-build-35391-695/root/chroot_tmpdir/scmroot/rubygem-unicode-display_width'...
$ git fetch origin 29fd4ceeb1cfa3173509909f65b5d432b1898cb9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-unicode-display_width
 * [new ref]         29fd4ceeb1cfa3173509909f65b5d432b1898cb9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 29fd4ce Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild