$ git clone -n https://src.fedoraproject.org/rpms/scl-utils-build-helpers.git /var/lib/mock/f45-build-35665-698/root/chroot_tmpdir/scmroot/scl-utils-build-helpers
Cloning into '/var/lib/mock/f45-build-35665-698/root/chroot_tmpdir/scmroot/scl-utils-build-helpers'...
$ git fetch origin 26db416df7a20a29f219370e7a1c38be4b4766e2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/scl-utils-build-helpers
 * [new ref]         26db416df7a20a29f219370e7a1c38be4b4766e2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26db416 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild