$ git clone -n https://src.fedoraproject.org/rpms/efi-rpm-macros.git /var/lib/mock/f41-build-861812-170406/root/chroot_tmpdir/scmroot/efi-rpm-macros
Cloning into '/var/lib/mock/f41-build-861812-170406/root/chroot_tmpdir/scmroot/efi-rpm-macros'...
$ git fetch origin 6745963d48402d01623cb4c5abc19068413724fd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/efi-rpm-macros
 * [new ref]         6745963d48402d01623cb4c5abc19068413724fd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6745963 add riscv64 support