$ git clone -n https://src.fedoraproject.org/rpms/electrum.git /var/lib/mock/f39-build-1706597-41221/root/chroot_tmpdir/scmroot/electrum
Cloning into '/var/lib/mock/f39-build-1706597-41221/root/chroot_tmpdir/scmroot/electrum'...
$ git fetch origin 67fd8a8d97a8605974bdb993161010c2345efc73:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/electrum
 * [new ref]         67fd8a8d97a8605974bdb993161010c2345efc73 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 67fd8a8 Drop x86 support (leaf package)