$ git clone -n https://src.fedoraproject.org/rpms/rust-gag.git /var/lib/mock/f38-build-side-43-rust-devel-1411699-31436/root/chroot_tmpdir/scmroot/rust-gag
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1411699-31436/root/chroot_tmpdir/scmroot/rust-gag'...
$ git fetch origin 8c102633301f43d44e6593300474b71d4b0245c6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gag
 * [new ref]         8c102633301f43d44e6593300474b71d4b0245c6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c10263 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild