$ git clone -n https://src.fedoraproject.org/rpms/rust-alacritty.git /var/lib/mock/f42-build-875643-179409/root/chroot_tmpdir/scmroot/rust-alacritty
Cloning into '/var/lib/mock/f42-build-875643-179409/root/chroot_tmpdir/scmroot/rust-alacritty'...
$ git fetch origin 254090e905637c067b27284302e33e2f473a1e7f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-alacritty
 * [new ref]         254090e905637c067b27284302e33e2f473a1e7f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 254090e Update to 0.15.1