$ git clone -n https://src.fedoraproject.org/rpms/rust-nom.git /var/lib/mock/f38-build-side-43-rust-devel-1412098-31438/root/chroot_tmpdir/scmroot/rust-nom
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1412098-31438/root/chroot_tmpdir/scmroot/rust-nom'...
$ git fetch origin d4540e0c3adb25299800c50cef6f795b99c145a8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nom
 * [new ref]         d4540e0c3adb25299800c50cef6f795b99c145a8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d4540e0 Update to version 7.1.3; Fixes RHBZ#2157285