$ git clone -n https://src.fedoraproject.org/rpms/signon-kwallet-extension.git /var/lib/mock/f45-build-35920-700/root/chroot_tmpdir/scmroot/signon-kwallet-extension
Cloning into '/var/lib/mock/f45-build-35920-700/root/chroot_tmpdir/scmroot/signon-kwallet-extension'...
$ git fetch origin c287490299a5ed20cc507689878590bd9a2ac40d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/signon-kwallet-extension
 * [new ref]         c287490299a5ed20cc507689878590bd9a2ac40d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c287490 26.08.1