$ git clone -n https://src.fedoraproject.org/rpms/rust-fscommon.git /var/lib/mock/f40-build-2712735-72054/root/chroot_tmpdir/scmroot/rust-fscommon
Cloning into '/var/lib/mock/f40-build-2712735-72054/root/chroot_tmpdir/scmroot/rust-fscommon'...
$ git fetch origin 817341c1daffa6443c231e35a11312a8e03eacc6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-fscommon
 * [new ref]         817341c1daffa6443c231e35a11312a8e03eacc6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 817341c Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild