$ git clone -n https://src.fedoraproject.org/rpms/dogtag-pki.git /var/lib/mock/f42-build-866994-174619/root/chroot_tmpdir/scmroot/dogtag-pki
Cloning into '/var/lib/mock/f42-build-866994-174619/root/chroot_tmpdir/scmroot/dogtag-pki'...
$ git fetch origin 9b5f381509f09ebf81cb0cb3c125239b4a0effbe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dogtag-pki
 * [new ref]         9b5f381509f09ebf81cb0cb3c125239b4a0effbe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b5f381 Fix build on non x86_64 architecture