$ git clone -n https://src.fedoraproject.org/rpms/rust-idna0.3.git /var/lib/mock/f42-build-3231190-41191/root/chroot_tmpdir/scmroot/rust-idna0.3
Cloning into '/var/lib/mock/f42-build-3231190-41191/root/chroot_tmpdir/scmroot/rust-idna0.3'...
$ git fetch origin b2a05a44427289fecadfd56908e4e28ea2b877bc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-idna0.3
 * [new ref]         b2a05a44427289fecadfd56908e4e28ea2b877bc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2a05a4 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild