$ git clone -n https://src.fedoraproject.org/rpms/rust-impl-more.git /var/lib/mock/f42-build-3231228-41191/root/chroot_tmpdir/scmroot/rust-impl-more
Cloning into '/var/lib/mock/f42-build-3231228-41191/root/chroot_tmpdir/scmroot/rust-impl-more'...
$ git fetch origin 9521c143712ab7c9a4768efcd94b622379a31700:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-impl-more
 * [new ref]         9521c143712ab7c9a4768efcd94b622379a31700 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9521c14 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild