$ git clone -n https://src.fedoraproject.org/rpms/rubygem-native-package-installer.git /var/lib/mock/f45-build-35139-693/root/chroot_tmpdir/scmroot/rubygem-native-package-installer
Cloning into '/var/lib/mock/f45-build-35139-693/root/chroot_tmpdir/scmroot/rubygem-native-package-installer'...
$ git fetch origin 6e69530143695d1ca422810e30721d9671a5068b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-native-package-installer
 * [new ref]         6e69530143695d1ca422810e30721d9671a5068b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e69530 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild