$ git clone -n https://src.fedoraproject.org/rpms/rust-serde_with_macros.git /var/lib/mock/f41-build-1197908-22358/root/chroot_tmpdir/scmroot/rust-serde_with_macros
Cloning into '/var/lib/mock/f41-build-1197908-22358/root/chroot_tmpdir/scmroot/rust-serde_with_macros'...
$ git fetch origin 5eb19c542595362ad18176914b1c7b48fb020637:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serde_with_macros
 * [new ref]         5eb19c542595362ad18176914b1c7b48fb020637 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5eb19c5 Update to version 3.8.1; Fixes RHBZ#2269075