$ git clone -n https://src.fedoraproject.org/rpms/mtxclient.git /var/lib/mock/f41-build-808184-145705/root/chroot_tmpdir/scmroot/mtxclient
Cloning into '/var/lib/mock/f41-build-808184-145705/root/chroot_tmpdir/scmroot/mtxclient'...
$ git fetch origin bc93e36b2744fbeeb159f96529578a6192adeeed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mtxclient
 * [new ref]         bc93e36b2744fbeeb159f96529578a6192adeeed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc93e36 Rebuilt for spdlog 1.14.1