$ git clone -n https://src.fedoraproject.org/rpms/rust-ignore.git /var/lib/mock/f38-build-side-42-init-devel-1138444-30393/root/chroot_tmpdir/scmroot/rust-ignore
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1138444-30393/root/chroot_tmpdir/scmroot/rust-ignore'...
$ git fetch origin 43274ab99cd16d557dfda3b25e48184764e4ec77:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ignore
 * [new ref]         43274ab99cd16d557dfda3b25e48184764e4ec77 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 43274ab Update to version 0.4.20; Fixes RHBZ#2158506