$ git clone -n https://src.fedoraproject.org/rpms/arm-image-installer.git /var/lib/mock/f40-build-1990992-43450/root/chroot_tmpdir/scmroot/arm-image-installer
Cloning into '/var/lib/mock/f40-build-1990992-43450/root/chroot_tmpdir/scmroot/arm-image-installer'...
$ git fetch origin d69ccdde3f293950963a288a5ec636c0f092eb1b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/arm-image-installer
 * [new ref]         d69ccdde3f293950963a288a5ec636c0f092eb1b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d69ccdd bump spec