$ git clone -n https://src.fedoraproject.org/rpms/rust-unic-segment.git /var/lib/mock/f42-build-3251785-41222/root/chroot_tmpdir/scmroot/rust-unic-segment
Cloning into '/var/lib/mock/f42-build-3251785-41222/root/chroot_tmpdir/scmroot/rust-unic-segment'...
$ git fetch origin a5c4b48defa0ea9e5d2d6ee8f6a5e9f497561c58:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-unic-segment
 * [new ref]         a5c4b48defa0ea9e5d2d6ee8f6a5e9f497561c58 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a5c4b48 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild