$ git clone -n https://src.fedoraproject.org/rpms/firecracker.git /var/lib/mock/f41-build-side-1-3137343-39794/root/chroot_tmpdir/scmroot/firecracker
Cloning into '/var/lib/mock/f41-build-side-1-3137343-39794/root/chroot_tmpdir/scmroot/firecracker'...
$ git fetch origin 951e7912c51f6b67e683db53de89b3c51d97af1c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/firecracker
 * [new ref]         951e7912c51f6b67e683db53de89b3c51d97af1c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 951e791 Update to version 1.10.1