$ git clone -n https://src.fedoraproject.org/rpms/rust-sval_derive.git /var/lib/mock/f38-build-side-43-rust-devel-1415837-31455/root/chroot_tmpdir/scmroot/rust-sval_derive
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1415837-31455/root/chroot_tmpdir/scmroot/rust-sval_derive'...
$ git fetch origin 4c7a3f65b0b8e3ffab56d501fe0bd767cf65c58f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sval_derive
 * [new ref]         4c7a3f65b0b8e3ffab56d501fe0bd767cf65c58f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4c7a3f6 Update to version 2.6.1; Fixes RHBZ#2181434