$ git clone -n https://src.fedoraproject.org/rpms/stressapptest.git /var/lib/mock/f45-build-36529-706/root/chroot_tmpdir/scmroot/stressapptest
Cloning into '/var/lib/mock/f45-build-36529-706/root/chroot_tmpdir/scmroot/stressapptest'...
$ git fetch origin 2ecf4d74c091c73ddae0c43e143f900a777b9ddb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/stressapptest
 * [new ref]         2ecf4d74c091c73ddae0c43e143f900a777b9ddb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2ecf4d7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild