$ git clone -n https://src.fedoraproject.org/rpms/mtxclient.git /var/lib/mock/f42-build-3421861-45166/root/chroot_tmpdir/scmroot/mtxclient
Cloning into '/var/lib/mock/f42-build-3421861-45166/root/chroot_tmpdir/scmroot/mtxclient'...
$ git fetch origin 947e125525d8a957458cb80167732e5dce9ed475:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mtxclient
 * [new ref]         947e125525d8a957458cb80167732e5dce9ed475 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 947e125 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild